Advertisements
Advertisements
प्रश्न
What do you understand by the term radioactivity?
Advertisements
उत्तर
The process of self, spontaneous and random emission of a or P and y radiations from the nucleus of elements of atomic number higher than 82, is called radioactivity.
संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
Under which conditions does the nucleus of an atom tend to radioactive?
State any two precautions to be taken while handling radioactive substances.
A nucleus `""_11^24Na` emits a beta particle to change into Magnesium (Mg)
(i) Write the symbolic equation for the process.
(ii) What are numbers 24 and 11 called?
(iii) What is the general name of `""_12^24Mg `with respect to `""_11^24Na` ?
A radioactive source emits three types of radiations. Name them.
(i) Name the radiations which are charged.
(ii) Name the radiations which are most penetrating.
(iii) Name the radiations which travel with the speed of light.
(iv) Name the radiations which have the largest mass.
Why should a radioactive substance not be touched by hands?
In a cathode ray tube state. How is it possible to increase the rate of emission of electrons.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
Unit of radioactivity is _______
A radioactive element is placed in an evacuated chamber. Then the rate of radioactive decay will ______.
